Bently Nevada vb7 Portable Data sheet
vb7 Portable Data Collector, Analyzer and
Balancer
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The vb7 Portable Data Collector, Analyzer and Balancer
instrument is a dual channel vibration data collector,
analyzer and balancer. You can use this device for on-route
and off-route data collection, machine-sideanalysis and
diagnosis as well as on-site dynamic balance correction.
The vb7 Portable Data Collector, Analyzer and Balancer is
certified for Class 1Division 2 hazardous areas. It is
ergonomically designed and lightweight for all day comfort.
The vb7 provides recordings with up to 6,400 lines of
resolution and up to 40 kHz F
settling algorithm and 6Pack recording system offer quick,
one-step data recording.
The vb7 Portable Data Collector, Analyzer and Balancer has
plenty of storage and long battery life, and is backed by a five
year warranty.
The vb7 Portable Data Collector, Analyzer and Balancer is one
of Bently Nevada hardware monitoring assets that work with
System 1 software.
max
116M5255 Rev. F
. Our patented adaptive
The vb7 Portable Data Collector, Analyzer and Balancer
offers the following features:
l Dual channel simultaneous recordings
l 6,400lines FFTresolution
l Supports 40 kHz F
l Two-plane balancing
l Laser speed sensor for automatic capture of machine
running speed
l Keyphasor tach mode
l 1 GB memory
l ≥ 95 dB dynamic range
max
vb7 Portable Data Collector, Analyzerand Balancer
Datasheet 116M5255 Rev. F
l Spectrum and waveform recordings
l Demodulation for early detection of
rotating machinery problems such as
bearing faults
l Unique 6Pack recording system
l Full analysis capabilities such as time
synchronous averaging, coastdown and
runup, bump test, cross-channel phase,
orbit plot, and long time waveform
l DC-coupled sensor support
l Numeric parameter input via keypad with
trend and alarm capability
l Sensor cable self-test feature
l Option to add flex features such as modal
analysis and Remote Comms
l USB host port for data transfer to external
USB drive
l Upgradable Proflash system and free
firmware updates for 5 years
l Five-year warranty on the instrument
hardware
2/9
vb7 Portable Data Collector, Analyzer and Balancer
Datasheet 116M5255 Rev. F
Specifications
Sensors
Sensor Input
Compatible
Sensor Types
AC Coupled
Range
DC Coupled
Ranges
Connectors
Analog to
Digital
Conversion
Sensor
Excitation
Current
Sensor
Detection
Tachometer Sensor
Sensor Type
Laser Sensor
Range
Tachometer Input
Supported
Sensor Types
Power Supply
to Sensor
TTL Pulse
Rating
Keyphasor
Thresholds
Speed Range
Accuracy ± 0.1 %
Output to
Two channels simultaneous
sampling
Accelerometer, velocity,
displacement, current
16 V peak-peak Allows for ± 8 V
sensor output swing (± 80 g)
0 V to 20 V, -10 V to 10 V, -20 V to 0 V
E.g. For reading prox-probe gap
2 x BNC (CH1/CH2)
Safety feature:Break-free inline
connector
24-bit ADC
0 mA or 2.2 mA (configurable), 24 V
maximum
2.2 mA required power for IEPE/ICP
type accelerometer
Warns if short circuit or not
connected
Laser sensor with reflective tape
Sensor triggers on beam reflection
10 cm to 2 m nominal Range
depends on size of reflective tape
Laser Tach, Contact, TTL Pulse,
Keyphasor Instrument has optically
isolated input
5 V, 50 mA
3.5 V (4 mA) min 28 V (5 mA) max
Off-state 0.8 V
7.7 ± 0.5 V, 13.2 ± 0.8 V, 18.5 ± 1 V
Nominally 8 V, 13 V, 18 V
10 RPM to 300,000 RPM (0.2 Hz to 5
kHz)
Pulse width at least 0.1 ms
Up to 140 Hz (8400 CPM)
Drive Strobe
Typical Depends on strobe type
Special cable required
Parameter Indication
> 1000 g (10,000 m/s2) > 1000 in/sec
Maximum
Levels (peak)
Dynamic
Signal Range
Harmonic
Distortion
Units
Magnitude
and Cursors
Base
Accuracy
High
Frequency
Attenuation
AC Coupling
Attenuation
Attenuation
Due to
Integration
(normal
mode)
Attenuation
Due to
Integration
(low
frequency
mode)
(25,000 mm/s) > 20 in (500 mm) >
10,000 amps
Effective limit is sensor sensitivity and
output voltage.
> 95 dB
typical at 400 line resolution
Less than -70 dB typical
Other distortions and noise are lower
g or m/s2 or adB in/s or mm/s or vdB
mil or mm or µm adB, vdB, amps, user
defined
0-peak, peak-peak or RMS Autoscale by 1000x when required
US and SI options for adB and vdB
Overall RMS value Waveform True
pk-pk Dual cursors Harmonics
Digital readouts on chart
± 1% of readings approximately 0.1 dB
For AC signal: % of reading For DC
signal: % of full scale
≤ 0.1 dB 100 Hz to 10 kHz ≤ 3 dB >10 kHz
to 40 kHz
Attenuation tolerances are in
addition to base accuracy.
≤ 0.1 dB 10 Hz to <100 Hz ≤ 3 dB 1 Hz to
<10 Hz
≤ 0.1 dB 10 Hz to <100 Hz ≤ 1.5 dB 1 Hz to
<10 Hz
Values apply to single integration.
(Acceleration to velocity)
Double the values for double
integration (Acceleration to
displacement)
≤ 0.1 dB 1 Hz to <100 Hz
≤ 1.5 dB 0.2 Hz to <1 Hz
Applies when coupling = DC and
F
≤ 100 Hz
max
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